[PATCH v7, part3 04/16] mm/x86: use free_reserved_area() to simplify code

From: Jiang Liu
Date: Fri May 17 2013 - 11:46:15 EST


Use common help function free_reserved_area() to simplify code.

Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Cc: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: Jianguo Wu <wujianguo@xxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
arch/x86/mm/init.c | 14 +++-----------
arch/x86/mm/init_64.c | 5 ++---
2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index fed9993..9048d94 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -494,7 +494,6 @@ int devmem_is_allowed(unsigned long pagenr)

void free_init_pages(char *what, unsigned long begin, unsigned long end)
{
- unsigned long addr;
unsigned long begin_aligned, end_aligned;

/* Make sure boundaries are page aligned */
@@ -509,8 +508,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
if (begin >= end)
return;

- addr = begin;
-
/*
* If debugging page accesses then do not free this memory but
* mark them not present - any buggy init-section access will
@@ -529,18 +526,13 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
set_memory_nx(begin, (end - begin) >> PAGE_SHIFT);
set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);

- printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-
- for (; addr < end; addr += PAGE_SIZE) {
- memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
- free_reserved_page(virt_to_page(addr));
- }
+ free_reserved_area(begin, end, POISON_FREE_INITMEM, what);
#endif
}

void free_initmem(void)
{
- free_init_pages("unused kernel memory",
+ free_init_pages("unused kernel",
(unsigned long)(&__init_begin),
(unsigned long)(&__init_end));
}
@@ -566,7 +558,7 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
* - relocate_initrd()
* So here We can do PAGE_ALIGN() safely to get partial page to be freed
*/
- free_init_pages("initrd memory", start, PAGE_ALIGN(end));
+ free_init_pages("initrd", start, PAGE_ALIGN(end));
}
#endif

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index bb00c46..32e2f25 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1166,11 +1166,10 @@ void mark_rodata_ro(void)
set_memory_ro(start, (end-start) >> PAGE_SHIFT);
#endif

- free_init_pages("unused kernel memory",
+ free_init_pages("unused kernel",
(unsigned long) __va(__pa_symbol(text_end)),
(unsigned long) __va(__pa_symbol(rodata_start)));
-
- free_init_pages("unused kernel memory",
+ free_init_pages("unused kernel",
(unsigned long) __va(__pa_symbol(rodata_end)),
(unsigned long) __va(__pa_symbol(_sdata)));
}
--
1.8.1.2

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